Add a base implementation of SHA-256 support
SHA-1 is weak and we need to transition to a new hash function. For some time, we have referred to this new function as NewHash. Recently, we decided to pick SHA-256 as NewHash. The reasons behind the choice of SHA-256 are outlined in the thread starting at [1] and in the commit history for the hash function transition document. Add a basic implementation of SHA-256 based off libtomcrypt, which is in the public domain. Optimize it and restructure it to meet our coding standards. Pull in the update and final functions from the SHA-1 block implementation, as we know these function correctly with all compilers. This implementation is slower than SHA-1, but more performant implementations will be introduced in future commits. Wire up SHA-256 in the list of hash algorithms, and add a test that the algorithm works correctly. Note that with this patch, it is still not possible to switch to using SHA-256 in Git. Additional patches are needed to prepare the code to handle a larger hash algorithm and further test fixes are needed. [1] https://public-inbox.org/git/20180609224913.GC38834@genre.crustytoothpaste.net/ Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
brian m. carlson committed
Nov 14, 2018 at 04:09 UTC
13eeedb5d17ca3539600b6618d103b652ecc8ab0
10 files changed
+331
-4
Makefile
+4
@@ -739,6 +739,7 @@ TEST_BUILTINS_OBJS += test-run-command.o
739
TEST_BUILTINS_OBJS += test-scrap-cache-tree.o
740
TEST_BUILTINS_OBJS += test-sha1.o
741
TEST_BUILTINS_OBJS += test-sha1-array.o
742
+TEST_BUILTINS_OBJS += test-sha256.o
743
TEST_BUILTINS_OBJS += test-sigchain.o
744
TEST_BUILTINS_OBJS += test-strcmp-offset.o
745
TEST_BUILTINS_OBJS += test-string-list.o
@@ -1633,6 +1634,9 @@ endif
1634
endif
1635
endif
1636
1637
+LIB_OBJS += sha256/block/sha256.o
1638
+BASIC_CFLAGS += -DSHA256_BLK
1639
+
1640
ifdef SHA1_MAX_BLOCK_SIZE
1641
LIB_OBJS += compat/sha1-chunked.o
1642
BASIC_CFLAGS += -DSHA1_MAX_BLOCK_SIZE="$(SHA1_MAX_BLOCK_SIZE)"
cache.h
+9
-3
@@ -48,11 +48,17 @@ unsigned long git_deflate_bound(git_zstream *, unsigned long);
48
/* The block size of SHA-1. */
49
#define GIT_SHA1_BLKSZ 64
50
51
+/* The length in bytes and in hex digits of an object name (SHA-256 value). */
52
+#define GIT_SHA256_RAWSZ 32
53
+#define GIT_SHA256_HEXSZ (2 * GIT_SHA256_RAWSZ)
54
+/* The block size of SHA-256. */
55
+#define GIT_SHA256_BLKSZ 64
56
+
57
/* The length in byte and in hex digits of the largest possible hash value. */
52
-#define GIT_MAX_RAWSZ GIT_SHA1_RAWSZ
53
-#define GIT_MAX_HEXSZ GIT_SHA1_HEXSZ
58
+#define GIT_MAX_RAWSZ GIT_SHA256_RAWSZ
59
+#define GIT_MAX_HEXSZ GIT_SHA256_HEXSZ
60
/* The largest possible block size for any supported hash. */
55
-#define GIT_MAX_BLKSZ GIT_SHA1_BLKSZ
61
+#define GIT_MAX_BLKSZ GIT_SHA256_BLKSZ
62
63
struct object_id {
64
unsigned char hash[GIT_MAX_RAWSZ];
hash.h
+18
-1
@@ -15,6 +15,8 @@
15
#include "block-sha1/sha1.h"
16
#endif
17
18
+#include "sha256/block/sha256.h"
19
+
20
#ifndef platform_SHA_CTX
21
/*
22
* platform's underlying implementation of SHA-1; could be OpenSSL,
@@ -34,6 +36,18 @@
36
#define git_SHA1_Update platform_SHA1_Update
37
#define git_SHA1_Final platform_SHA1_Final
38
39
+#ifndef platform_SHA256_CTX
40
+#define platform_SHA256_CTX SHA256_CTX
41
+#define platform_SHA256_Init SHA256_Init
42
+#define platform_SHA256_Update SHA256_Update
43
+#define platform_SHA256_Final SHA256_Final
44
+#endif
45
+
46
+#define git_SHA256_CTX platform_SHA256_CTX
47
+#define git_SHA256_Init platform_SHA256_Init
48
+#define git_SHA256_Update platform_SHA256_Update
49
+#define git_SHA256_Final platform_SHA256_Final
50
+
51
#ifdef SHA1_MAX_BLOCK_SIZE
52
#include "compat/sha1-chunked.h"
53
#undef git_SHA1_Update
@@ -52,12 +66,15 @@
66
#define GIT_HASH_UNKNOWN 0
67
/* SHA-1 */
68
#define GIT_HASH_SHA1 1
69
+/* SHA-256 */
70
+#define GIT_HASH_SHA256 2
71
/* Number of algorithms supported (including unknown). */
56
-#define GIT_HASH_NALGOS (GIT_HASH_SHA1 + 1)
72
+#define GIT_HASH_NALGOS (GIT_HASH_SHA256 + 1)
73
74
/* A suitably aligned type for stack allocations of hash contexts. */
75
union git_hash_ctx {
76
git_SHA_CTX sha1;
77
+ git_SHA256_CTX sha256;
78
};
79
typedef union git_hash_ctx git_hash_ctx;
80
sha1-file.c
+45
@@ -40,10 +40,20 @@
40
#define EMPTY_TREE_SHA1_BIN_LITERAL \
41
"\x4b\x82\x5d\xc6\x42\xcb\x6e\xb9\xa0\x60" \
42
"\xe5\x4b\xf8\xd6\x92\x88\xfb\xee\x49\x04"
43
+#define EMPTY_TREE_SHA256_BIN_LITERAL \
44
+ "\x6e\xf1\x9b\x41\x22\x5c\x53\x69\xf1\xc1" \
45
+ "\x04\xd4\x5d\x8d\x85\xef\xa9\xb0\x57\xb5" \
46
+ "\x3b\x14\xb4\xb9\xb9\x39\xdd\x74\xde\xcc" \
47
+ "\x53\x21"
48
49
#define EMPTY_BLOB_SHA1_BIN_LITERAL \
50
"\xe6\x9d\xe2\x9b\xb2\xd1\xd6\x43\x4b\x8b" \
51
"\x29\xae\x77\x5a\xd8\xc2\xe4\x8c\x53\x91"
52
+#define EMPTY_BLOB_SHA256_BIN_LITERAL \
53
+ "\x47\x3a\x0f\x4c\x3b\xe8\xa9\x36\x81\xa2" \
54
+ "\x67\xe3\xb1\xe9\xa7\xdc\xda\x11\x85\x43" \
55
+ "\x6f\xe1\x41\xf7\x74\x91\x20\xa3\x03\x72" \
56
+ "\x18\x13"
57
58
const unsigned char null_sha1[GIT_MAX_RAWSZ];
59
const struct object_id null_oid;
@@ -53,6 +63,12 @@ static const struct object_id empty_tree_oid = {
63
static const struct object_id empty_blob_oid = {
64
EMPTY_BLOB_SHA1_BIN_LITERAL
65
};
66
+static const struct object_id empty_tree_oid_sha256 = {
67
+ EMPTY_TREE_SHA256_BIN_LITERAL
68
+};
69
+static const struct object_id empty_blob_oid_sha256 = {
70
+ EMPTY_BLOB_SHA256_BIN_LITERAL
71
+};
72
73
static void git_hash_sha1_init(git_hash_ctx *ctx)
74
{
@@ -69,6 +85,22 @@ static void git_hash_sha1_final(unsigned char *hash, git_hash_ctx *ctx)
85
git_SHA1_Final(hash, &ctx->sha1);
86
}
87
88
+
89
+static void git_hash_sha256_init(git_hash_ctx *ctx)
90
+{
91
+ git_SHA256_Init(&ctx->sha256);
92
+}
93
+
94
+static void git_hash_sha256_update(git_hash_ctx *ctx, const void *data, size_t len)
95
+{
96
+ git_SHA256_Update(&ctx->sha256, data, len);
97
+}
98
+
99
+static void git_hash_sha256_final(unsigned char *hash, git_hash_ctx *ctx)
100
+{
101
+ git_SHA256_Final(hash, &ctx->sha256);
102
+}
103
+
104
static void git_hash_unknown_init(git_hash_ctx *ctx)
105
{
106
BUG("trying to init unknown hash");
@@ -110,6 +142,19 @@ const struct git_hash_algo hash_algos[GIT_HASH_NALGOS] = {
142
&empty_tree_oid,
143
&empty_blob_oid,
144
},
145
+ {
146
+ "sha256",
147
+ /* "s256", big-endian */
148
+ 0x73323536,
149
+ GIT_SHA256_RAWSZ,
150
+ GIT_SHA256_HEXSZ,
151
+ GIT_SHA256_BLKSZ,
152
+ git_hash_sha256_init,
153
+ git_hash_sha256_update,
154
+ git_hash_sha256_final,
155
+ &empty_tree_oid_sha256,
156
+ &empty_blob_oid_sha256,
157
+ }
158
};
159
160
const char *empty_tree_oid_hex(void)
sha256/block/sha256.c
new
+196
@@ -0,0 +1,196 @@
1
+#include "git-compat-util.h"
2
+#include "./sha256.h"
3
+
4
+#undef RND
5
+#undef BLKSIZE
6
+
7
+#define BLKSIZE blk_SHA256_BLKSIZE
8
+
9
+void blk_SHA256_Init(blk_SHA256_CTX *ctx)
10
+{
11
+ ctx->offset = 0;
12
+ ctx->size = 0;
13
+ ctx->state[0] = 0x6a09e667ul;
14
+ ctx->state[1] = 0xbb67ae85ul;
15
+ ctx->state[2] = 0x3c6ef372ul;
16
+ ctx->state[3] = 0xa54ff53aul;
17
+ ctx->state[4] = 0x510e527ful;
18
+ ctx->state[5] = 0x9b05688cul;
19
+ ctx->state[6] = 0x1f83d9abul;
20
+ ctx->state[7] = 0x5be0cd19ul;
21
+}
22
+
23
+static inline uint32_t ror(uint32_t x, unsigned n)
24
+{
25
+ return (x >> n) | (x << (32 - n));
26
+}
27
+
28
+static inline uint32_t ch(uint32_t x, uint32_t y, uint32_t z)
29
+{
30
+ return z ^ (x & (y ^ z));
31
+}
32
+
33
+static inline uint32_t maj(uint32_t x, uint32_t y, uint32_t z)
34
+{
35
+ return ((x | y) & z) | (x & y);
36
+}
37
+
38
+static inline uint32_t sigma0(uint32_t x)
39
+{
40
+ return ror(x, 2) ^ ror(x, 13) ^ ror(x, 22);
41
+}
42
+
43
+static inline uint32_t sigma1(uint32_t x)
44
+{
45
+ return ror(x, 6) ^ ror(x, 11) ^ ror(x, 25);
46
+}
47
+
48
+static inline uint32_t gamma0(uint32_t x)
49
+{
50
+ return ror(x, 7) ^ ror(x, 18) ^ (x >> 3);
51
+}
52
+
53
+static inline uint32_t gamma1(uint32_t x)
54
+{
55
+ return ror(x, 17) ^ ror(x, 19) ^ (x >> 10);
56
+}
57
+
58
+static void blk_SHA256_Transform(blk_SHA256_CTX *ctx, const unsigned char *buf)
59
+{
60
+
61
+ uint32_t S[8], W[64], t0, t1;
62
+ int i;
63
+
64
+ /* copy state into S */
65
+ for (i = 0; i < 8; i++)
66
+ S[i] = ctx->state[i];
67
+
68
+ /* copy the state into 512-bits into W[0..15] */
69
+ for (i = 0; i < 16; i++, buf += sizeof(uint32_t))
70
+ W[i] = get_be32(buf);
71
+
72
+ /* fill W[16..63] */
73
+ for (i = 16; i < 64; i++)
74
+ W[i] = gamma1(W[i - 2]) + W[i - 7] + gamma0(W[i - 15]) + W[i - 16];
75
+
76
+#define RND(a,b,c,d,e,f,g,h,i,ki) \
77
+ t0 = h + sigma1(e) + ch(e, f, g) + ki + W[i]; \
78
+ t1 = sigma0(a) + maj(a, b, c); \
79
+ d += t0; \
80
+ h = t0 + t1;
81
+
82
+ RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],0,0x428a2f98);
83
+ RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],1,0x71374491);
84
+ RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],2,0xb5c0fbcf);
85
+ RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],3,0xe9b5dba5);
86
+ RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],4,0x3956c25b);
87
+ RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],5,0x59f111f1);
88
+ RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],6,0x923f82a4);
89
+ RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],7,0xab1c5ed5);
90
+ RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],8,0xd807aa98);
91
+ RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],9,0x12835b01);
92
+ RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],10,0x243185be);
93
+ RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],11,0x550c7dc3);
94
+ RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],12,0x72be5d74);
95
+ RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],13,0x80deb1fe);
96
+ RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],14,0x9bdc06a7);
97
+ RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],15,0xc19bf174);
98
+ RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],16,0xe49b69c1);
99
+ RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],17,0xefbe4786);
100
+ RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],18,0x0fc19dc6);
101
+ RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],19,0x240ca1cc);
102
+ RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],20,0x2de92c6f);
103
+ RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],21,0x4a7484aa);
104
+ RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],22,0x5cb0a9dc);
105
+ RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],23,0x76f988da);
106
+ RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],24,0x983e5152);
107
+ RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],25,0xa831c66d);
108
+ RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],26,0xb00327c8);
109
+ RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],27,0xbf597fc7);
110
+ RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],28,0xc6e00bf3);
111
+ RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],29,0xd5a79147);
112
+ RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],30,0x06ca6351);
113
+ RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],31,0x14292967);
114
+ RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],32,0x27b70a85);
115
+ RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],33,0x2e1b2138);
116
+ RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],34,0x4d2c6dfc);
117
+ RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],35,0x53380d13);
118
+ RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],36,0x650a7354);
119
+ RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],37,0x766a0abb);
120
+ RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],38,0x81c2c92e);
121
+ RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],39,0x92722c85);
122
+ RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],40,0xa2bfe8a1);
123
+ RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],41,0xa81a664b);
124
+ RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],42,0xc24b8b70);
125
+ RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],43,0xc76c51a3);
126
+ RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],44,0xd192e819);
127
+ RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],45,0xd6990624);
128
+ RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],46,0xf40e3585);
129
+ RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],47,0x106aa070);
130
+ RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],48,0x19a4c116);
131
+ RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],49,0x1e376c08);
132
+ RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],50,0x2748774c);
133
+ RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],51,0x34b0bcb5);
134
+ RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],52,0x391c0cb3);
135
+ RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],53,0x4ed8aa4a);
136
+ RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],54,0x5b9cca4f);
137
+ RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],55,0x682e6ff3);
138
+ RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],56,0x748f82ee);
139
+ RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],57,0x78a5636f);
140
+ RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],58,0x84c87814);
141
+ RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],59,0x8cc70208);
142
+ RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],60,0x90befffa);
143
+ RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],61,0xa4506ceb);
144
+ RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],62,0xbef9a3f7);
145
+ RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],63,0xc67178f2);
146
+
147
+ for (i = 0; i < 8; i++)
148
+ ctx->state[i] += S[i];
149
+}
150
+
151
+void blk_SHA256_Update(blk_SHA256_CTX *ctx, const void *data, size_t len)
152
+{
153
+ unsigned int len_buf = ctx->size & 63;
154
+
155
+ ctx->size += len;
156
+
157
+ /* Read the data into buf and process blocks as they get full */
158
+ if (len_buf) {
159
+ unsigned int left = 64 - len_buf;
160
+ if (len < left)
161
+ left = len;
162
+ memcpy(len_buf + ctx->buf, data, left);
163
+ len_buf = (len_buf + left) & 63;
164
+ len -= left;
165
+ data = ((const char *)data + left);
166
+ if (len_buf)
167
+ return;
168
+ blk_SHA256_Transform(ctx, ctx->buf);
169
+ }
170
+ while (len >= 64) {
171
+ blk_SHA256_Transform(ctx, data);
172
+ data = ((const char *)data + 64);
173
+ len -= 64;
174
+ }
175
+ if (len)
176
+ memcpy(ctx->buf, data, len);
177
+}
178
+
179
+void blk_SHA256_Final(unsigned char *digest, blk_SHA256_CTX *ctx)
180
+{
181
+ static const unsigned char pad[64] = { 0x80 };
182
+ unsigned int padlen[2];
183
+ int i;
184
+
185
+ /* Pad with a binary 1 (ie 0x80), then zeroes, then length */
186
+ padlen[0] = htonl((uint32_t)(ctx->size >> 29));
187
+ padlen[1] = htonl((uint32_t)(ctx->size << 3));
188
+
189
+ i = ctx->size & 63;
190
+ blk_SHA256_Update(ctx, pad, 1 + (63 & (55 - i)));
191
+ blk_SHA256_Update(ctx, padlen, 8);
192
+
193
+ /* copy output */
194
+ for (i = 0; i < 8; i++, digest += sizeof(uint32_t))
195
+ put_be32(digest, ctx->state[i]);
196
+}
sha256/block/sha256.h
new
+24
@@ -0,0 +1,24 @@
1
+#ifndef SHA256_BLOCK_SHA256_H
2
+#define SHA256_BLOCK_SHA256_H
3
+
4
+#define blk_SHA256_BLKSIZE 64
5
+
6
+struct blk_SHA256_CTX {
7
+ uint32_t state[8];
8
+ uint64_t size;
9
+ uint32_t offset;
10
+ uint8_t buf[blk_SHA256_BLKSIZE];
11
+};
12
+
13
+typedef struct blk_SHA256_CTX blk_SHA256_CTX;
14
+
15
+void blk_SHA256_Init(blk_SHA256_CTX *ctx);
16
+void blk_SHA256_Update(blk_SHA256_CTX *ctx, const void *data, size_t len);
17
+void blk_SHA256_Final(unsigned char *digest, blk_SHA256_CTX *ctx);
18
+
19
+#define platform_SHA256_CTX blk_SHA256_CTX
20
+#define platform_SHA256_Init blk_SHA256_Init
21
+#define platform_SHA256_Update blk_SHA256_Update
22
+#define platform_SHA256_Final blk_SHA256_Final
23
+
24
+#endif
t/helper/test-sha256.c
new
+7
@@ -0,0 +1,7 @@
1
+#include "test-tool.h"
2
+#include "cache.h"
3
+
4
+int cmd__sha256(int ac, const char **av)
5
+{
6
+ return cmd_hash_impl(ac, av, GIT_HASH_SHA256);
7
+}
t/helper/test-tool.c
+1
@@ -43,6 +43,7 @@ static struct test_cmd cmds[] = {
43
{ "scrap-cache-tree", cmd__scrap_cache_tree },
44
{ "sha1", cmd__sha1 },
45
{ "sha1-array", cmd__sha1_array },
46
+ { "sha256", cmd__sha256 },
47
{ "sigchain", cmd__sigchain },
48
{ "strcmp-offset", cmd__strcmp_offset },
49
{ "string-list", cmd__string_list },
t/helper/test-tool.h
+1
@@ -39,6 +39,7 @@ int cmd__run_command(int argc, const char **argv);
39
int cmd__scrap_cache_tree(int argc, const char **argv);
40
int cmd__sha1(int argc, const char **argv);
41
int cmd__sha1_array(int argc, const char **argv);
42
+int cmd__sha256(int argc, const char **argv);
43
int cmd__sigchain(int argc, const char **argv);
44
int cmd__strcmp_offset(int argc, const char **argv);
45
int cmd__string_list(int argc, const char **argv);
t/t0015-hash.sh
+26
@@ -26,4 +26,30 @@ test_expect_success 'test basic SHA-1 hash values' '
26
grep 4b825dc642cb6eb9a060e54bf8d69288fbee4904 actual
27
'
28
29
+test_expect_success 'test basic SHA-256 hash values' '
30
+ test-tool sha256 </dev/null >actual &&
31
+ grep e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855 actual &&
32
+ printf "a" | test-tool sha256 >actual &&
33
+ grep ca978112ca1bbdcafac231b39a23dc4da786eff8147c4e72b9807785afee48bb actual &&
34
+ printf "abc" | test-tool sha256 >actual &&
35
+ grep ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad actual &&
36
+ printf "message digest" | test-tool sha256 >actual &&
37
+ grep f7846f55cf23e14eebeab5b4e1550cad5b509e3348fbc4efa3a1413d393cb650 actual &&
38
+ printf "abcdefghijklmnopqrstuvwxyz" | test-tool sha256 >actual &&
39
+ grep 71c480df93d6ae2f1efad1447c66c9525e316218cf51fc8d9ed832f2daf18b73 actual &&
40
+ # Try to exercise the chunking code by turning autoflush on.
41
+ perl -e "$| = 1; print q{aaaaaaaaaa} for 1..100000;" | \
42
+ test-tool sha256 >actual &&
43
+ grep cdc76e5c9914fb9281a1c7e284d73e67f1809a48a497200e046d39ccc7112cd0 actual &&
44
+ perl -e "$| = 1; print q{abcdefghijklmnopqrstuvwxyz} for 1..100000;" | \
45
+ test-tool sha256 >actual &&
46
+ grep e406ba321ca712ad35a698bf0af8d61fc4dc40eca6bdcea4697962724ccbde35 actual &&
47
+ printf "blob 0\0" | test-tool sha256 >actual &&
48
+ grep 473a0f4c3be8a93681a267e3b1e9a7dcda1185436fe141f7749120a303721813 actual &&
49
+ printf "blob 3\0abc" | test-tool sha256 >actual &&
50
+ grep c1cf6e465077930e88dc5136641d402f72a229ddd996f627d60e9639eaba35a6 actual &&
51
+ printf "tree 0\0" | test-tool sha256 >actual &&
52
+ grep 6ef19b41225c5369f1c104d45d8d85efa9b057b53b14b4b9b939dd74decc5321 actual
53
+'
54
+
55
test_done